Not informing customers that items are out of stock

I placed an order on Takealot on the 27-07-2019 for Make-up (Revlon Colorstay Nude) and a couple of other make-up goodies. It did not state that the supplier was out of stock. I paid with Payfast to ensure a quicker delivery (Our area does not qualify for same day delivery) I received confirmation of my order with the "shipment date" being the 31-07-2019. I thought perhaps there was an error online because it is now the 02-08-2019 and when i track my order it is still only marked as paid. I now receive an email 3 Days after my parcel should have been shipped that takealot do not have stock of the Revlon Base and that it will take 2-4 WORKING days before they receive it. This is really unacceptable. Had i had know, i would have rather taken a 15min drive to town to buy my foundation and make-up goods and probably saved money and effort.

Why take my money and not keep me updated?

I am really upset by this, I have ordered a few times from takealot and never had a problem. (in fact my order usually arrives a day before it should)